>> You have no idea how much stuff expects the shell to behave like bourne shell.

Would you please elaborate what you mean by this statement?

The C shell (csh / tcsh) and the Korn shell (ksh) don't follow Bourne shell conventions and yet they work fine as login shells and script interpreters.

It seems logical that PowerShell could be further adapted to be more Unix-like with "read" and "print" functions that would attempt to bridge the object / plaintext divide similar to the "read" and "print" functions that are used in Lisp-like languages to convert between Lisp-like forms and plaintext.